package org.lynn.javax.demo.imooc;

import javax.swing.*;
import java.awt.*;

/**
 * @author linzou@linkdoc.com
 * @ClassName: AlgoFrame
 * @Description:
 * @date 2019/6/20 3:48 PM
 */
public class AlgoFrame extends JFrame {

    private int canvasWidth;
    private int canvasHeight;
    private JPanel canvas;

    public AlgoFrame(String title, int canvasWidth, int canvasHeight) {

        super(title);

        this.canvasWidth = canvasWidth;
        this.canvasHeight = canvasHeight;

        AlgoCanvas canvas = new AlgoCanvas();
        setContentPane(canvas);
        pack();

        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setResizable(false);

        setVisible(true);
    }

    public AlgoFrame(String title) {

        this(title, 1024, 768);
    }

    public int getCanvasWidth() {
        return canvasWidth;
    }

    public int getCanvasHeight() {
        return canvasHeight;
    }

    // data
    private Circle[] circles;

    public void render(Circle[] circles) {
        this.circles = circles;
        repaint();
    }

    private class AlgoCanvas extends JPanel {

        public AlgoCanvas() {
            // 双缓存
            super(true);
        }

        @Override
        public void paintComponent(Graphics g) {
            super.paintComponent(g);

            Graphics2D g2d = (Graphics2D) g;

            // 抗锯齿
            RenderingHints hints = new RenderingHints(
                    RenderingHints.KEY_ANTIALIASING,
                    RenderingHints.VALUE_ANTIALIAS_ON);
            hints.put(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
            g2d.addRenderingHints(hints);

            // 具体绘制
            AlgoVisHelper.setStrokeWidth(g2d, 1);
            AlgoVisHelper.setColor(g2d, Color.RED);
            for (Circle circle : circles) {
                if (!circle.isFilled) {
                    AlgoVisHelper.strokeCircle(g2d, circle.x, circle.y, circle.getR());
                } else {
                    AlgoVisHelper.fillCircle(g2d, circle.x, circle.y, circle.getR());
                }
            }
        }

        @Override
        public Dimension getPreferredSize() {
            return new Dimension(canvasWidth, canvasHeight);
        }
    }
}

